Musk mentioned that “most” of the features will be enabled, so not all.

Here’s the current list of the features that were available in vehicles with Autopilot 1, but not in Autopilot 2 at launch – with the ones that have already been pushed to new vehicles marked:

Auto windshield wipers

Auto low beam headlights

Auto high beam headlights

Auto-dimming touchscreen B instrument cluster

Parking assist

Blind spot detection

Forward collision warning

Auto emergency braking

Side collision warning

Side collision avoidance

Lane departure warning

Speed assist

Traffic-aware cruise control

Autosteer

Auto lane change

Autopark

Summon

Your guess about which ones is as good as mine, but I wouldn’t be surprised if the most safety-related like Autosteer and Auto emergency braking came after the first batch.

Once the update is released, Tesla will be able to gradually push the features mentioned above to bring the new system to parity with the last generation and start improving from there with the new Autosteer+, Smart Summon, and other new ‘Enhanced Autopilot’ features.

Of course, the goal is for the ‘Tesla Vision’ system powering the ‘Enhanced Autopilot’ features to one day enable fully self-driving capability. Musk thinks that day could come as soon as the end of 2017.